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+
+clc
+clear
+//Input data
+gh=35//Gross head in m
+md=2//Mean diameter in m
+N=145//Speed in rpm
+a=30//Angle in degrees
+oa=28//Outlet angle in degrees
+x=7//Percentage of gross head lost
+y=8//Reduction in relative velocity in percent
+
+//Calculations
+H=((100-x)/100)*gh//Net haed in m
+V1=sqrt(2*9.81*H)//Velocity in m/s
+Vb=(3.14*md*N)/60//Velocity in m/s
+b1=atand((V1*sind(a))/((V1*cosd(a))-Vb))//Angle in degrees
+Vr1=((V1*sind(a))/sind(b1))//Velocity in m/s
+Vr2=((100-y)/100)*Vr1//Velocity in m/s
+Vw1=(V1*cosd(a))//Velocity in m/s
+Vw2=(Vb-(Vr2*cosd(oa)))//Velocity in m/s
+E=((Vb*(Vw1-Vw2))/9.81)//Workdone in kg.m/kg
+nb=(E/gh)*100//Hydraulic efficiency in percent
+
+//Output
+printf('Blade angle at inlet is %3.0f degrees \n Hydraulic efficiency is %3.0f percent',b1,nb)